Rope-engine for marine transfers.



1". s. MILLER.

ROPE ENGINE FOR MARINE TRANSFERS.

APPLICATION YILED JANJZ, 1910.

ifigii gg I Patented Sept. 3,1912.

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fi w I 5] mm nfoz THOMAS SPENCER MILLER, OF SOUTH ORANGE, NEW JERSEY.

ROPE-ENGINE FOR MARINE TRANSFERS.

Specification of Letters Patent.

Patented Sept. 3, 1912.

\ Original application filed March 5, 1909, Serial No. 481,450. Divided and this application filed January 12, 1910. Serial No. 537,656.

To all whom it'may concern:

Be it known that I, THOMAS SPENOER I have fully and clearly illustrated my invention in the accompanying drawings to betaken as a part of this specification wherein p Figure l is a longitudinal section through a rope drum constituting an embodiment of my invention; Fig. 2 is a view in elevation -partly in longitudinal section of 'another embodiment of the same invention Fi 3 is a detailed view in elevation of the f r-iction face of one of the drums.

.Before proceeding with a detailed de-.

scription of my invention I will state that while the same is particularly adapted for use in connection with marine transfer, apparatus of the general character or type forming the subject-matter of my application Serial No. 481,450, filed March 5, 1909,

I desire it understood that the invention is capable of general application wherever it 1 would be advantageous to use a two-part drum having a slipping connection for one of its parts and I therefore do not desire to be limited in any way to-the use or combination set forth in my said application. I will now proceed to describe the embodiments of 'the invention illustrated in the drawings, and referring to said drawings bycnaracters 'of reference: Sland 32 are the hearings in the frame for the shaftv 33. The rope drum parts 16" and 16 are the. hub of the splined drum part 16";

36 isa set screw threadedinto the end of part 16*.

the shaft and thrusting against the cross key 34 through the pin 37 38 is a lock nut.

39 is the spur wheel fast on the shaft, which meshes with a pinion on the engine crank-shaft.

By adjusting the set screw 36 the drum part 16 is forced toward the drum part 16 and this in turn is forced toward the spur wheel 39. To provide the friction surfaces which, under the adjusted thrust of the set screw 36, transmit the power from the spur wheel to the drumpart 16 and also from the shaft through splined drum part '16 to the drum part .16 thus providing' a drum part 16 with double headed friction surfaces, I make the following provision:

Between. the drum parts 16 and 16 is the friction ring 40 composed of an alloy of soft cast-iron and steel and also the friction ring 41 composed of cast steel. These rings are fast, respectively, to the drum parts 16- and 16. Between the drum part 16 and the spur wheel 39 is the friction ring-42 of an alloy of soft cast-iron and steel and the friction ring 43 of cast steel, being fast, respectively, to the-spur wheel and'the drum Behind the friction ring 43 the flange of the. drum is provided with an annular air space 44 ventilated by a series of holes 45. The air entering the annular passage 44 through these holes comes di-.

rectly in contact with the rear of the fric-' tion ring 43 opposite the friction surface and keeps it cool. A corresponding annular passage 46 and ventilating holes. 47 are provided in the body of the'drum part 16* at the back of the friction ring 41 for the cooling thereof. The friction rings 40- and 42 are both made in sections, as shown in detail in Fig. 3, the various sections being separated by radial spaces 48 connecting at both ends with the open air'so as to provide a free circulation of airfor cooling the sections, These friction rings are described and fully covered in my Patent No. 715,111, Dec. 2, 1902.

49 is an ordinary band brake operating upon the flange of the drum part 16*" an if need be, there may be another band brake o crating upon the w eel 50.

flange of the 59k. I

known without illustration.

The drum parts 16 and 16 and the friction rings 40 and 41 are preferably made of equal diameter, so that an undivided drum surface will be presented between the end flanges.

Although as above stated, the invention is capable of use in any situation where it is desired to have a positively actuated and a slip drum on the same shaft, the invention is particularly applicable tothe purpose such as described in my said application, and I will now set forth the operation thereof briefly, it being understood that, for example, the holding rope of a clam-shell bucket is wound upon the drum part 16 and the closing and hoisting rope on the part 16 I It will be.understood that the set screw 36 is so adjusted that the pressure between the friction surfaces is just suflicient to take up any slack in the rope which may be wound on the drum part 16 the two drum parts movingv in unison except when an excessive pull occurs on the drum 16, or when the band-brake 49 .is applied to said part 16, at which time the part l6 may slip relative to the driving gear and the drum part 16". If the operator desires to operate a clam-shell bucket to take a load, he would permit the drums to pay out their ropes in unison until'the bucket was in position to receive the load. He would then setthe brake 49 which would arrest the drum part l6 which would permit the blades of the bucket to open in a manner which is well The brake is then released'and the further motion of the engine lowers the bucket onto the "pile. By then reversing the engine and thereby winding up the'closing rope on the part 16 the motion of the drum part 16 being arrested by the pull on its rope caused by the load, the bucket is closed. When the bucket is closed the drum part '16 will continue to wind up the drum 3 and the bucket is hoisted to the height desired, the slack in the holding rope being taken up. by the drum part v16*. When the bucket is to be dumped the brake 49 is to be set to hold the drum part 16 and the continued rotation of the part '16 will cause the bucket to open, it being understood that the engine is reversed,

so that the drum part l6 pays out its rope.

The engine shown in Fig. '2 presents a further very important invention, adding to the simplicity, economy and smallness of space required. In this construction there is a loose drum part 16 t-he splined drum part 16", the end flanges 51 and 52, the brake 49 and the shaft 33 with its bearings .31 and 32 as before. There. are also the friction surfaces composed of the pair of friction rings 40, '41 and the pair of friction rings 42, 43. In this case, however the spur wheel is dispensedwith and in lieuthereof one of the rings 42 or 43 is fixed to a spider 55, the hub 56 of which is splined to the shaft. Also in lieu of having one of the rings 40 or 41 fixed to the drum part 16", it is fixed to a spider 57, the hub 58 of which is splined to the shaft. In this case the drum part l6 may be keyed fast to the shaft.

To produce the endwise thrust I cut a thread 59 directly on the shaft and thread thereto a nut 60 and a like nut 61. By setting up these nuts the spider 55 binds the drum part l6 toward the drum part l6 so as to produce the requisite pressure between the friction surfaces. That this pressure may be yielding, I prefer to intcrposc the coiled spring 62 between the spider 57 and the drum part 16". These springs also permit of the expansion of the parts under heat and maintains the friction pressure substantially constant under variations from heat. However, these coiled springs 62 may, if desired, be dispensed with and also the spider 57, the friction ring 41 being,-under those circumstances, made fast to the drum part 16*.

In the engine shown in Fig. 2 the cranks 63, 64 and crank disks 65, 66 and eccentrics 67, 68 are mounted directly on the drum shaft 33, and the additional brake 69 for occasional use is applied tothe crank disk 66.

The cylinders 70 and 71 are made ofvery large bore sufficient to maintain the requisite pull 'in hoistin and swinging without the introduction 0 gearing, shafts and bearings. The brake 69 upon the crank disk or fly wheel 66 controls the drum 16 that is keyed to the shaft while the loose drum 16 is controlled by the brake 49acting directly upon it. The steam reverse-valve '72 is of well known construction and is operated by hand lever 73. Lever 7 3 together with footlever 74 for operating brake 49 and foot lever 7 5 for operating brake 69 are arranged in the most convenient position for the operator.

While in the preferred form of the invention I have shown and described the friction surfaces between the drum parts as being of the same diameter as the drum parts, I do not desire to .be limited as to the exact diameter of these frictions or the area of the engaging faces thereof as they-may be of less diameter than the drum parts, for instance as shown in Fig.2 of the drawings,

a driving member fixed thereto, two drums memos one revoluble thereon and the other splined directly thereto toithereby revolve with the shaft in both directions, friction surfaces wheel and revoluble drum, a drum splineddirectly to said shaft next said revoluble drum and revoluble in both directions with the shaft, friction surfaces between said drums and means whereby the pressure between said friction surfaces may be adjusted.

3. In a rope drum, in combination, a shaft, a two-part drum, one part being splined directly to saidshaft to rotate in both directions therewith and the other revoluble on said shaft, a driving member fixed to said shaft, friction surfaces between said driving member and one of said drums, friction surfaces between said drums and mechanism whereby the pressure between said friction surfaces is ad usted. i

4:. In a rope drum, in combination, a drum shaft, a driving member fixed to the shaft, a two-part drum on the shaft, one part being fixed to the shaft to rotate therewith in both directions, and the other part being. arranged betweenthe splined part and the driving member, and freely revoluble relative to the shaft, both of-isaid parts being movable longitudinally of the shaft, clutch means for connecting the freely revoluble drum part and the driving member, and thrust means acting on the splined drum part to move both said parts longitudinally of the shaft to connect said clutch means to couple the freely revoluble drum part and the driving member.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

I THOMAS SPENCER MILLER. Witnesses:

ERNEST PULsrom), HARRY J. F. SMITH. 

